Bill de Blasio has left almost a dozen of paid staffers with nothing to do as they await their assignments — a delay seen by some as an indication the new mayor is "dragging his heels." Photo: Wireimage

More than a dozen mayoral staffers have been awaiting job placements for three weeks — and have so little to do that they’re watching Netflix and playing cards while on the government payroll, The Post has learned.

The staffers, ranging from entry-level employees to managers and deputy advisers — and who worked for Mayor de Blasio when he was the city’s public advocate — had been promised better titles and salaries in the new administration, according to a source.

But since de Blasio took office on Jan. 2, they’ve been “twiddling their thumbs” in a third-floor office at 253 Broadway across from City Hall watching movies, playing cards, learning a second language or going on afternoon shopping sprees downtown.

The bored staffers have even been betting on how late the persistently tardy mayor will be at his press conferences.

All are collecting salaries.

“They’ve very demoralized, very frustrated and very bored. There’s a lot of tension because none of them knows what’s happening,” said the source.

“It’s like, come on — you could have figured this out a long time ago.”

The de Blasio staffers — some of whom have been with him for several years and others who pitched in on his campaign even when he was running in fourth place — aren’t the only ones waiting to be assigned jobs.

A host of agencies — including the departments of Buildings, Parks and City Planning, as well as the Housing Authority — are operating without commissioners.

Several other agencies — including the Fire Department, Sanitation and the Office of Emergency Management — have hold-over commissioners who are in place only temporarily.

“He’s leaving so many people hanging who have been loyal to him for so long.”

City Hall officials confirmed that some of the staffers in de Blasio’s former office haven’t yet been given formalized roles. But they insisted that everyone was working, either on the transition or for the administration.

They pointed to Jeff Merritt, a former senior adviser to the ex-public advocate, who’s working with the Department of Information Technology & Telecommunications. And Roberto Perez, a former deputy chief of staff, has been assigned to the Office of Intergovernmental Affairs.

But the idle staffers say they haven’t been given assignments beyond occasional busy-work — like matching résumés that have been submitted to the administration’s transition team with the appropriate agencies, according to the source.

They’ve also been compiling a list of board members de Blasio is responsible for appointing, although he hasn’t yet.

“They have 20-year-old college kids who are volunteers doing the same stuff,” the source said.